{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "We have combined spectrophotometric and calorimetric methods to show that there is no significant interaction between citrate - coated Ag - NPs and BHb at physiological pH and 20 degrees C ."}
{"Chemical": ["citrate", "Ag"]}